C# 读写INI配置文件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsApplication16
{
public partial class Form1 : Form
{
string path = GetAppPath() + "PrintSet.ini";

public static string GetAppPath()
{
string startupPath = Application.StartupPath;
if (!startupPath.EndsWith(@"\"))
{
startupPath = startupPath + @"\";
}
return startupPath;
}

public Form1()
{
InitializeComponent();
}

[DllImport("Kernel32")]
public static extern bool WritePrivateProfileString
(
string section,
string key,
string val,
string filePath
);

[DllImport("kernel32")]
public static extern int GetPrivateProfileString
(
string section,
string key,
string def,
byte[] retVal,
int size,
string filePath
);

public static string ReadString(string Section, string Ident, string Default, string FileName)
{
Byte[] Buffer = new Byte[65535];
int bufLen = GetPrivateProfileString(Section, Ident, Default, Buffer, Buffer.GetUpperBound(0), FileName);

string s = Encoding.GetEncoding(0).GetString(Buffer);
s = s.Substring(0, bufLen);
return s.Trim();
}

private void button2_Click(object sender, EventArgs e)
{

WritePrivateProfileString("test","test","500",path);
WritePrivateProfileString("test1", "test", "700", path);

}

private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show(Convert.ToString(ReadString("test", "test", "200", path)));
}

}
}